MXPA01010586A

MXPA01010586A - Radiation-curable composite board or film.

Info

Publication number: MXPA01010586A
Application number: MXPA01010586A
Authority: MX
Inventors: Karl Holdik
Original assignee: Basf Ag
Priority date: 1999-04-21
Filing date: 2000-04-11
Publication date: 2005-04-29
Also published as: JP5065504B2; JP2011105013A; ATE273131T1; US20040224162A1; DE19917965A1; US7241494B2; AU3965800A; US7479322B2; JP4808847B2; JP2002542074A; DE50007387D1; EP1171298B2; KR100677780B1; US6777089B1; US20070284775A1; US20070184294A1; KR20020025057A; EP1171298A1; EP1171298B1; WO2000063015A1

Abstract

The invention relates to a radiation-curable composite board or film that consists of at least one substrate layer and one cover layer. The invention is characterized in that the cover layer consists of a radiation-curable substance with a glass transition temperature of greater than 40 degree C.

Description

COMPOSITE CARDBOARD OR FILM THAT CAN BE CURED BY RADIATION The invention relates to a laminated sheet or composite film that can be cured with radiation consisting of at least one substrate layer and an outer layer, the outer layer being composed of a composition that can be cured with radiation and with a transition temperature vitrea of more than 40 ° C.

The specification further relates to a process for producing the laminated sheet or composite film that can be cured with radiation and to a process for producing molded pieces coated with the sheet or film.

DE-A-196 28 966 and DE-A-196 54 918. describe dry paint films where the paint has a glass transition temperature of less than 40 ° C. Curing requires two steps: partial curing before the film adheres to the substrates, and subsequent final curing.

EP-A-361 351 likewise describes a dry paint film. In this case, the film is cured with radiation before being applied to the substrate moldings. DE-A-196 51 350 (0. Z. 47587) describes laminated sheets or composite films consisting of thermoplastic materials and do not have a coating that can be cured by radiation.

A disadvantage of dry paint films which can be cured with known radiation to date is that two or more steps are often required to effect the curing with radiation, as described in DE-A-196 28 966. When the film is completely cured with radiation before the coating operation, this often becomes more brittle and difficult to deform, which is detrimental to its subsequent processing.

With existing radiation curable films, the coated moldings often lack sufficient scratch resistance and sufficient elasticity when working with mechanical means. An object of the present invention is to provide laminated, composite, radiation curable sheets or films which are easy to process and which give rise to the coating of the molded parts by extremely simple techniques. The coated molded parts must have good mechanical properties, effective resistance to external influences such as good weather resistance, for example, and in particular they must be mechanically stable, for example having good scratch resistance and high elasticity.

We have found that this objective is achieved by the laminated composite sheets or films which can be cured with radiation defined at the beginning and which are referred to below as film. We have also found processes to coat molded parts with film and coated molded parts.

The film should include a substrate layer and an outer layer that is applied to the substrate layer directly or, when there are other internal layers, indirectly.

External layer The outer layer can be cured with radiation. Accordingly, the composition of the outer layer that is used can be cured with radiation and comprises groups that can be cured by a free radical or ionic mechanism (for brevity, curable groups). Preference is given to groups that can be cured with free radicals.

The composition that can be cured with radiation preferably is transparent. After curing has also been performed, the outer layer is preferably transparent: that is, it is a clear coating layer.

An important constituent of the compositions that can be cured with radiation is binder, which upon spreading forms the outer layer.

The composition that can be cured with radiation preferably contains a binder selected from: i) polymers containing ethylenically unsaturated groups ii) mixtures of i) with ethylenically unsaturated compounds of low molecular mass iii) mixtures of thermoplastic polymers saturated with ethylenically unsaturated compounds. i) Examples of suitable polymers include ethylenically unsaturated compounds, but also polyesters, polyethers, polycarbonates, polyepoxides or polyurethanes.

These conveniently include unsaturated polyester resins which consist mainly of polyols, especially diols and polycarboxylic acid, especially dicarboxylic acid, where one of the components of the esterification contains a copolymerizable, ethylenically unsaturated group. Examples of the components in question include maleic acid, fumaric acid and maleic anhydride.

Preference is given to polymers of ethylenically unsaturated compounds such as those obtained in particular by means of polymerization by the addition of free radicals.

Free radical addition polymers include, in particular, composite polymers of more than 40% by weight, with particular preference greater than 60% by weight of acrylic monomers, particularly Ci-Cs alkyl (meth) acrylates, preferably C1 -C. As an example of the ethylenically unsaturated groups, the polymers include in particular (meth) acrylic groups. These groups can be attached to the polymer, for example, by reacting the (meth) acrylic acid with epoxide groups in the polymer (for example using glycidyl (meth) acrylate as a comonomer).

In the same way, preference is given to polyurethanes. Their unsaturated groups again are preferably (meth) acrylic groups linked to the polyurethane by reacting hydroxyalkyl (meth) acrylates with isocyanate groups, for example.

The polymers i) per se can be processed as thermoplastics. ': or) The unsaturated polymers i) can also be used in mixtures with ethylenically unsaturated compounds of low molecular weight.

The compounds of low molecular mass in this context are compounds having a number average molecular weight of less than 2000 g / mol, (as determined by gel permeation chromatography using a polystyrene as a standard).

Suitable examples include free-radically polymerizable compounds containing only one copolymerizable, ethylenically unsaturated group.

As an example mention may be made of Ci-C'20 / vinylaromatic alkyl (et) acrylates having up to 20 carbon atoms, vinyl esters of carboxylic acids containing up to 20 carbon atoms, ethylenically unsaturated nitriles, vinyl ethers of alcohols containing from 1 to 10 carbon atoms and aliphatic hydrocarbons having from 2 to 20, preferably from 2 to 8 carbon atoms and one or two double bonds.

Preferred alkyl (meth) acrylates are those with a C 1 -C 10 alkyl radical, such as methyl methacrylate, methyl acrylate, n-acrylate, and _ ia.iiPiiiiiffi ¿-butyl, ethyl acrylate and 2-ethylhexyl acrylate.

Particularly suitable are mixtures of alkyl (meth) acrylates.

Examples of the vinyl esters of carboxylic acids having from 1 to 20 carbon atoms are vinyl laurate, vinyl stearate, vinyl propionate and vinyl acetate.

Examples of suitable vinyl aromatic compounds are vinyl toluene, alpha-butyl styrene, 4-n-butyl styrene, 4-n-decylstyrene and preferably styrene.

Examples of the nitriles are acrylonitrile and methacrylonitrile.

Examples of suitable vinyl ethers are vinyl methyl ether, vinyl isobutyl ether, vinyl hexyl ether and vinyl octyl ether.

As non-aromatic hydrocarbons having from 2 to 20, preferably from 2 to 8 carbon atoms, and one or two olefinic double bonds, mention may be made of butadiene, isoprene and also ethylene, propylene and isobutylene.

The contemplated compounds preferably include compounds which can be polymerized by free radicals and which contain two or more ethylenically unsaturated groups.

The compounds in question are particularly (meth) acrylate compounds, with preference being given in each case to the acrylate compounds: that is, the acrylic acid derivatives.

Preferred (meth) acrylate compounds contain from 2 to 20, more preferably from 2 to 8, and very particularly preferably from 2 to 6 copolymerizable, ethylenically unsaturated double bonds.

As (meth) acrylate compounds mention may be made of (meth) acrylates and in particular acrylates of polyfunctional alcohols, especially those which do not contain functional groups other than the hydroxyl groups or, if they have other functional groups, contain only ether groups. Examples of these alcohols include difunctional alcohols such as ethylene glycol and propylene glycol, and their superior condensation analogs such as diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, etc., butanediol, pentanediol-, hexanediol, neopentyl glycol, alkoxylated phenolic compounds as ethoxylated and / or propoxylated bisphenols, cyclohexanedimethanol, alcohols with a functionality of 3 or more such as glycerol, trimethylolpropane, butanetriol, trimethylolethane, pentaerythritol, dimethylolpropane, dipentaerythritol, sorbitol, mannitol and the corresponding alkoxylated alcohols, especially the ethoxylated and propoxylated alcohols.

The products of the alkoxylation can usually be obtained by reacting the above alcohols with alkylene oxides, especially ethylene oxide or propylene oxide. Preferably, the degree of alkoxylation per hydroxyl group is from 0 to 10, that is, 1 mole of hydroxyl group can be alkoxylated preferably with up to 10 moles of alkylene oxides.

The (meth) acrylate compounds further include polyester (meth) acrylates, which are the (meth) acrylic esters of the polyesterols.

Examples of suitable polyesterols are those which can be prepared by esterification of polycarboxylic acids, preferably dicarboxylic acids, with polyols, preferably diols. The raw materials for these hydroxyl-containing polyesters are known to the skilled worker. As dicarboxylic acids, preferential use can be made of succinic acid, glutaric acid, adipic acid, sebacic acid, o-phthalic acid, its isomers, its hydrogenation products, and also derivatives that can be esterified, such as the anhydrides or dialkyl esters of these acids. Suitable polyols include the aforementioned alcohols, preferably ethylene glycol, 1,2- and 1,3-propylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol and cyclohexanedimethanol, and also polyglycols of the ethylene type. glycol and propylene glycol.

The polyester (meth) acrylates can be prepared in a plurality of stages or even in a single step, as described for example in EP 279 303, from acrylic acid, polycarboxylic acid and polyol. iii) Examples of suitable saturated thermoplastic polymers include polymethyl methacrylate, polystyrene, high impact polymethyl methacrylate, high impact polystyrene, polycarbonate and polyurethanes.

The property of being cured with radiation is guaranteed by adding a compound that can be cured with radiation, ethylenically unsaturated. This may be one of the compounds mentioned in items i) and / or ii).

An important feature of the binder i) to iii) is that its vitreous transition temperature (Tg) is greater than 40 ° C, preferably greater than 50 ° C and particularly preferably greater than 60 ° C. In general, the Tg will not exceed a level of 130 ° C. (The figures refer to the binder before curing with radiation).

The vitreous transition temperature, Tg, of the binder can be determined by the FSC (differential scanning calorimetry) method in accordance with ASTM 3418/82.

The amount of the curable groups, ie the ethylenically unsaturated groups, is preferably from A ..- ¿Jf £ i. || | 0.001 to 0.2 moles, with particular preference from 0.005 to 0.15 moles, with very particular preference from 0.01 to 0.1 moles per1 100 g of the binder (solids, ie without water or other solvents).

The binder preferably has a viscosity from 0.02 to 100 Pas at 140 ° C (as determined on a rotary viscometer).

Compositions that can be cured with radiation may include other constituents. Particular mention may be made of photoinitiators, leveling agents and stabilizers. For outdoor use, i.e., for coatings that are exposed directly to daylight, the compositions will particularly include UV light absorbers and free radical scavengers.

The absorbers of UV light convert UV radiation into heat energy. Known UV absorbers include hydroxybenzophenones, benzotriazoles, cinnamic esters and oxalanilides.

Free radical scavengers bind to the intermediate free radicals that form. The main free radical scavengers include hindered amines known as HALS (hindered amine light stabilizers).

For outdoor applications, the total content of the UV absorber and the free radical scavenger is preferably from 0.1 to 5 parts by weight, particularly preferably from 0.5 to 4 parts by weight, based on 100 parts by weight of the compounds They can be cured with radiation.

Furthermore, in addition to the compounds that can be cured with radiation, the composition that can be cured with radiation can include other compounds that contribute to curing by other chemical reactions. Suitable examples include polyisocyanates that crosslink with hydroxyl or amino groups.

The composition that can be cured with radiation can be in the form without water and without solvent, or in the form of solution or dispersion.

Preference is given to compositions that can be cured with radiation without water or solvent, or aqueous solutions or aqueous dispersions.

Particular preference is given to compositions that can be cured with radiation without water or solvent.

The composition that can be cured with radiation can exhibit thermoplastic deformation and in particular can be extruded.

The compositions that can be cured with previous radiation form the outer layer. The thickness of the layer (after drying and curing) is preferably from 10 to 100 μ.

Substrate layer The substrate layer serves as a support and is proposed to ensure that the composite as a whole remains permanently rigid.

The substrate layer preferably consists of a thermoplastic polymer, in particular polymethyl methacrylates, polybutyl methacrylates, polyurethanes, polyethylene terephthalates, polybutylene terephthalates, vinylidene polyfluorides, polyvinyl chloride, polyesters, polyolefins, polyamides, polycarbonates (PC), acrylonitrile polymers. butadiene-styrene (ABS), acrylic-styrene-acrylonitrile (ASA) copolymers, acrylonitrile-ethylene-propylene-diene-styrene (A-EPDM) copolymers, polyether imides, polyether ketones, polyphenylsulfides, polyphenyl ethers or mixtures thereof.

Preference is given to ASA, especially in accordance with DE 19 651 350, and to the ASA / PC mixture. Likewise, preference is given to polymethyl methacrylate (PMMA) or modified PMMA against shocks.

The thickness of the layer is preferably from 50 μ to 5 mm. Particular preference is given, especially when the substrate layer is injection molded, at a thickness of from 100 to 1C00μ, in particular from 100 to 500μ.

The polymer of the substrate layer may contain additives, especially fillers or fibers. The substrate layer can also have color, in which case it can also act as a color layer.

Other layers The film may include Other layers in addition to the outer layer and the substrate layer.

Suitable examples include inner layers with color or other layers of thermoplastic material (thermoplastic inner layers), which reinforce the film or serve as release layers.

The thermoplastic inner layers can be made from the polymers mentioned above in the substrate layer.

Particular preference is given to polymethyl methacrylate (PMMA), preferably modified PMMA against shocks. Polyurethanes can also be mentioned. In the same way the layers of color consist of polymers. These include dyes or pigments that are distributed in the polymeric layer.

A preferred film has, for example, the following structure of the layers, the alphabetical sequence corresponding to the spatial arrangement: A) outer layer B) thermoplastic intermediate layer (optional) C) intermediate layer with color (optional) D) substrate layer E) adhesive layer (optional) On the reverse side (inverse for brevity) of the substrate layer (i.e., the side facing the article to be coated) an adhesive layer may have been applied, where the film is adhesively bonded to the substrate.

Applied to the transparent outer layer there may be a protective layer, for example a removable film that prevents unintentional curing. This thickness can represent, for example, from 50 to 100 μ. The protective layer may be composed, for example, of polyethylene or polyterephthalate. The protective layer can be separated before irradiation.

Otherwise, the irradiation can take place through the protective layer; for this, the protective layer must be transparent in the wavelength range of the irradiation.

The total thickness of the film preferably is from 50 to 1000 μ.

Production of the composite sheet or film The production of a compound from layers B) to D) can take place, for example, by co-extrusion of all or some of the layers.

By coextrusion, the individual components are fluidized in the extruders and, using special means, they are brought into contact with each other in such a way to obtain the films with a sequence of layers described above. For example, the components can be extruded through a slit nozzle. This process is elucidated in EP-A2-0 225 500. As a supplement to the processes described herein, it is also possible to use a process known as co-extrusion with adapter.

The compound can be produced by: traditional processes, for example by co-extrusion, as already described, or by lamination of the layers, with heatable rollers, for example. In this way it is possible first to produce a composite of the layers except for the outer layer, and then apply the outer layer by the usual techniques.

.. · ·. . · ¾. . . ·? **? ¾? * ?? The composition that can be cured by radiation can be applied to the substrate layer or to the compound in a simple manner, by casting, rolling, coating with aspersion blade, etc., for example and drying as appropriate.

Preference is given to the extrusion of the composition that can be cured with radiation, i.e., the outer layer. Where appropriate, the composition that can be cured with radiation can also be co-extruded with one or more other layers.

In the case of the extrusion (including co-extrusion) of the compositions that can be cured with radiation, the preparation of the composition that can be cured with radiation by mixing its constituents, and the preparation of the outer layer, can take place in an operation .

For this purpose, the thermoplastic constituents, for example, unsaturated polymers i) or the saturated polymers iii) (see above), can first of all be melted in the extruder. The required melting temperature depends on the polymer in question. After the merger operation, preferably, the ·? · · > other constituents can be dosed, especially compounds that can be cured with radiation ii) of low molecular mass (see above). The compounds act as plasticizers, thus reducing the temperature at which the composition is in molten form. The temperature with the addition of the compound that can be cured with radiation should be in particular below a critical temperature at which the compound that can be cured with radiation undergoes thermal curing.

The critical temperature can be easily determined by means of a calorimetric measurement, that is, a measurement of the heat absorbed with increases in temperature, according to the already described determination of the vitreous transition temperature.

The composition that can be cured with radiation is then extruded directly as the outer layer onto the existing compound or, in the case of co-extrusion, is extruded with the layers of the composite. The extrusion directly originates the laminated sheet or composite film.

The outer layer is resistant to blockage, that is, it does not stick, and it can be reticulated with radiation. The composite sheet or film exhibits thermoplastic deformation. If desired, the protective layer (protective film) can be placed below the outer layer directly after the production of the composite sheet or film.

The sheet or laminated film, composed, has high brightness and good mechanical properties. Rarely, cracking is observed.

The ability to be extended of the stratified sheet or film, preferably composed of at least 100%, relative to a. state not extended (at least 140 ° C, with a thickness of 30 μ).

Processes for use The film can be stored without partial curing (as described in DE-A 19 628 966) until further use.

There is very little, if any, stickiness or deterioration in the performance properties observed until the time of subsequent use.

The film is preferably used as the coating material.

In this case, a preferred method is to first coat the substrates and then cure the outer layer by means of radiation.

The coating can take place by bonding the film to the substrates. For this purpose, on the back of the substrate layer, the film is preferably provided with the adhesive layer E. Suitable substrates include wood, plastic or metal.

The coating can also take place by injection molding the film. For this purpose the film is thermoformed, preferably in a mold for thermoforming, and the back of the substrate layer is injection molded on the back with the polymer composition. The polymer composition comprises, for example, the polymers which were mentioned above in the description of the substrate layer or, for example, polyurethane, especially polyurethane foam The polymers may comprise additives, particular examples include fibers such as fibers of glass or loading materials.

The radiation curing of the outer layer takes place in this case preferably after the thermoforming operation and, with particular preference, after the subsequent injection molding of the film.

The curing with radiation is carried out with high energy light, for example, UV light, or electron beams. This can be done at relatively high temperatures. Preference is given in this case at a temperature above the Tg of the binder which can be cured with radiation.

Where crosslinkers are also included which carry out the additional thermal crosslinking, such as isocyanates, it is possible to carry out the thermal crosslinking by increasing the temperature up to 150 ° C, preferably up to 130 ° C, which can be done for example at the same time or even after of curing with radiation.

Applications and advantages It is possible to use films to coat molded articles. Any of the desired molded articles are manageable. With particular preference, the films are used to coat molded articles where the very good surface properties, high weather resistance and good resistance to UV light are important. Moreover, the resulting surfaces are highly resistant to scratches and firmly adhering, thus reliably avoiding the destruction of surfaces by scratches or delamination of surfaces. Accordingly, molded articles for outdoor use, outside of buildings, constitute a preferred application area. In particular, the films are used to coat parts of motorized vehicles, with convenient examples including wings, door trim components, fenders, aerodynamic deflectors, skirts and exterior mirrors.

Examples: I Synthesis of a coating material that can be cured with radiation: 426. 2 g of isopropylidenedicyclohexanol were dispersed in approximately 566.3 g of hydroxyethyl acrylate at 60 ° C with stirring. To this dispersion were added 1695.2 g of an isocyanurate of hexamethylene diisocyanate, 1.34 g of hydroquinone monomethyl ether, 2.69 g of 1,6-di-tert-butyl para-cresol and 0.134 g of phenothiazine, after the addition of 0.538. g of dibutyl tin dilaurate, the batch was heated to 93 ° C over the course of 20 minutes.After it had cooled to 75 ° C, 300 g of acetone were metered in. When the NCO value had dropped to 0.66%, Another 370 g of acetone was added, followed by dropwise addition of 14.87 g of methanol, then the mixture was stirred at 60 ° C until the NCO value had dropped to 0. The resin was mixed with an appropriate photoinitiator, applied to the mixture. a posterior injection molding film Luran S 797, and exposed to 100 ° C. The pencil hardness of the films was determined according to ASTM D 3363. Pencil hardness of the coated film: 2H Comparison: the pencil hardness of the molded film on its back by injection, untreated (Luran S 797): B Comparison: pencil hardness of the film with protection in posterior injection molding (Lucryl G 87): softer than 6B Two uncured acrylated polyacrylates having different Tg values, and uncured urethane acrylate, were applied to a Luran S support film and thermoformed at elevated temperature. After thermoforming the films were exposed to 100 ° C.

Hardness of the films: 2H urethane acrylate Binder resin (Tg (before exposure) = 46 ° C) 3H Binder resin (Tg (before exposure) = -6 ° C) H II Production of an external layer that can be cured with radiation He has First, a photoactive mixture was prepared by mixing the following constituents: Material% by weight Chemical composition Ebecryl® 40 23 Alkoxylated pentaerythritol triacrylate (UCB) Ebecryl® IRR 264 41 Triscrilate of a tris (2-hydroxyethyl) isocyanurate (UCB) Ebecryl® 1290 11 Aliphatic urethane acrylate (UCB) Ebecryl® 5129 11 Aliphatic urethane acrylate (UCB) Ebecryl® 350 5 Silicone diacrylate (UCB) Tinuvin® 292 1 Additive HALS (Ciba SC) Tinuvin® 400 1 Absorber of UV (Ciba SC) Irgacure® 184 6 Photoinitiator (Ciba SC) Lucirin® TPO 1 Photoinitiator (BASF) The polymethyl methacrylate (PMMA) Lucryl® G 55 was melted at a temperature from 190 to 220 ° C in an extruder and the photoactive mixture (one part by weight of the mixture to three parts by weight of Lucryl) was metered into the melt by below 170 ° C. The resulting melt was extruded in the form of a radiation curable film.

The film obtained was block resistant (ie non-sticky) and the resulting composite film was deformable and thermoformable. The external layer curable by radiation was cured using UV light. (120 W / cm, belt speed 2 to 3 m / min).

Ilb The photoactive mixture consisted of: Material% by weight Chemical mixture Ebecryl 2000 43 Aliphatic urethane acrylate (UCB) Ebecryl 264 22 Aliphatic triacrylate of a urethane acrylate in HDDA (UCB) Lucirin TPO-L 1 Photoinitiator (BASF) CGI 184 5 Photoinitiator (Ciba SC) Tinuvin 292 2 Additive HALS (Ciba SC) Tinuvin 400 2 Absorber of UV (Ciba SC) SR 9003 7 Diacrylate of neopentyl glycol propoxylated (Cray Valley) Ebebryl 350 2 Silicone diacrylate (UCB) CN 965 10 Aliphatic UR-Ac (Cray Valley) SR 344 5 Polyethylene glycol diacrylate (Cray Valley) Polyurethane KU-1-8602 (Bayer) was melted at 180-220 ° C in an extruder and the photoactive mixture (one part by weight to three parts by weight of the polyurethane) was dosed to melt at 160 ° C. The resulting melt was extruded in the form of a film with radiation.

The resulting outer layer was resistant to blocking and the resulting film was deformable and thermoformable.

The external layer curable with radiation was cured using UV light (120 W / cm, band speed 2 to 3 m / min).

Claims

CLAIMS The use of a laminated film or laminate, composite, which can be cured by radiation comprising at least one substrate layer and an outer layer for coating molded parts, wherein the outer layer is composed of a composition that can be cured with radiation that consists of a binder with a glass transition temperature of more than 40 ° C. . The use of a sheet or film as claimed in claim 1, wherein the outer layer is transparent. The use of a sheet or film as claimed in claim 1 or 2, wherein in addition there is an inner layer of color between the substrate layer and the outer layer. The use of a sheet or film as claimed in any of claims 1 to 3, wherein in addition there is a layer of polymethylmethacrylate between the inner layer of color and the outer layer. The use of a sheet or film as claimed in any of claims 1 to 4, wherein the composition that can be cured with radiation is in the non-crosslinked state. The use of a sheet or film as claimed in any of claims 1 to 5, wherein the composition that can be cured with radiation contains polymers containing ethylenically unsaturated groups, alone or as a mixture with compounds that can be cured with radiation , of low molecular mass, or mixtures of thermoplastic polymers saturated with ethylenically unsaturated compounds. The use of a sheet or film as claimed in any of claims 1 to 6, wherein the substrate layer comprises a layer of thermoplastic polymers, particularly polymethyl methacrylates, polybutyl methacrylates, polyurethanes, polyethylene terephthalates, polybutylene terephthalates, polyvinylidene fluorides, polyvinyl chlorides, polyesters, polyolefins, poly-amides, polycarbonates, acrylonitrile-butadiene-styrene polymers (ABS), acrylic-styrene-acrylonitrile copolymers (ASA), acrylonitrile-ethylene-propylene-diene-styrene copolymers (A-EPDM), polyether imides, polyether ketones, polyphenylene sulphides, polyphenylene ethers or mixtures thereof. A process for producing a laminated film, composite, which can be cured with radiation as claimed in any of claims 1 to 7, which consists of extruding the composition that can be cured with radiation. The process as claimed in claim 8, wherein the composition that can be cured with radiation and at least one other layer is co-extruded. A process to produce coated molded parts, especially parts for motorized vehicles, consisting of. adhesively bonding the layered laminated film or composite, which can be cured with radiation as claimed in any of claims 1 to 7, to the molded parts and then curing the outer layer by means of radiation. A process for producing coated polymeric molded parts, especially parts of motorized vehicles, which consists of thermoforming a laminated film or composite film, which can be cured with radiation as claimed in any of claims 1 to 1 in a thermoforming mold and it is molded on the back by injection, the back of the substrate layer with the polymer composition, the radiation curing of the outer layer is carried out after the thermoforming operation or after the subsequent injection molding. A coated molded part that can be obtained by a process as claimed in claim 10 or 11. A sheet or film comprising at least one substrate layer and an outer layer composed of a composition that can be cured with radiation comprising a binder with a vitreous transition temperature greater than 40 ° C, wherein there is also an intermediate color layer between the substrate layer and the outer layer. The sheet or film as claimed in claim 13, wherein in addition there is a layer of polymethyl methacrylate between the intermediate layer of color and the outer layer. The sheet or film as claimed in any of claims 13 and 14, wherein the composition that can be cured with radiation comprises polymers containing ethylenically unsaturated groups, alone or as a mixture with compounds that can be cured with radiation, of molecular mass low, or mixtures of thermoplastic polymers saturated with ethylenically unsaturated compounds.